Circle Track Crate Engine Technical Manual - Chevrolet Performance

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Engine Specifications Continued 88958603 & 604 Engine Camshaft Specifications. P/N 10185071 camshaft is installed in both the 603 & 604 engines. It is a roller camshaft design and uses hydraulic roller lifters. This camshaft has a red dab of paint located near the camshaft gear for identification. See section on valve lash for proper lash and procedure. Valve Lift: .474” intake and .510” exhaust. Duration @ .050”: 208 degrees intake and 221 degrees exhaust. Cam lobe centerline is: 112 degrees. Intake lobe lift .316”. Exhaust lobe lift .340”. Intake base circle radius: .60684”. Exhaust base circle radius: .583”. Dowel pin hole: Retarded 5 degrees from centerline of # 1 cylinder exhaust lobe, advanced 107 degrees from centerline of # 1 cylinder intake lobe. (107 +5 = 112 degrees lobe separation) Note: +/- .010” all dimensions and +/- 5 degrees angularity. Shown below is a graph of the cam profile for cam p/n 10185071 as used in 88958603 and 88958604 engines. 10185071 camshaft specifications Page 23
Torque Specifications & Sealers All of the torque specifications are in one location to be used as a “Quick Guide” during rebuilds. Also included in this section are proper torque sequence guidelines. GM has spent extensive time on engineering, metallurgy, and physical testing to achieve proper clamping loads on bolts. Any deviation of these specifications will affect the life of the engine. Sealers also affect clamp loads. The proper sealer should be used for each bolt where applicable. It is imperative that torque specifications and sealer recommendations be followed closely. All surfaces must be clean and free of debris. All tapped holes should have thread chasers run through them to clean old residue from the threads before re-assembly. Make sure you wear proper eye protection at all times. Because the cylinder block does not have blind head bolts, all the head bolts will require sealer. Factory new head bolts come with the proper sealer applied. Break-off sealing bolts installed from the factory have sealer applied. Replacement sealing bolts do not have sealer factory applied. Main Cap Bolts & Engine Galley Plugs Use light engine oil or CMD #3 on all main cap bolts during assembly. Use P/N 12346004 Teflon sealer on all oil passageway galley plugs. Do not over apply as it may clog lifters and other engine components. See next page for torque specifications. Head and Intake Bolts. 1. Use P/N 12346004 Teflon sealer on head bolts and intake bolts. 2. Use P/N 12346192 in tube form or 12346193 in cartridge form for intake china rails. A bead 3/8” wide and 3/8” tall should be all that is necessary to seal the intake rails. The sealer should be applied slightly up the cylinder head to “encase” the intake gasket and seal the corner where the intake/head and block come together. Make sure intake is clean. Camshaft Retainer & Gear Bolts When tightening camshaft bolts we recommend you use Blue Loctite on the threads. Oil Pan Bolts & Oil Pan Gasket No sealer is needed on oil pan bolts. They should be installed with light engine oil on threads. All three engines use one-piece oil pan gaskets. No sealer is necessary except in 3 areas. 1. Add a slight amount of sealer to the 4 corners of the pan where at the 5/16 bolt holes. 2. After pan is installed put silicon sealer around the front of the pan where it meets the timing cover. The sealer should “encapsulate” the gasket between the pan and the timing cover. 3. Add sealer at the rear of the pan where it meets the seal adapter. This should also “encapsulate” the gasket between the pan and the aluminum part of the rear seal adapter. Front Cover 1. The “602” engine uses a paper style gasket and will require a dab of P/N 12346192 silicon sealer at the bottom where the steel cover meets the block and oil pan. 2. The “603 & 604” engines have plastic covers with a built-in seal. They too require a dab of silicon sealer in the area where block, front cover and pan meet. Page 24
Page 1 and 2: Circle Track Crate Engine Technical
Page 3 and 4: Contents Continued Flywheel & Trans
Page 5 and 6: History GM has a long history of pr
Page 7 and 8: GM Circle Track Engines This sectio
Page 9 and 10: Installation Instructions Each engi
Page 11 and 12: Recommended Break-In Procedure Star
Page 13 and 14: Tune Up Specifications Continued Ca
Page 15 and 16: Engine Components Continued Cylinde
Page 17 and 18: Engine Components Continued Rocker
Page 19 and 20: Engine Specifications Continued Fac
Page 21 and 22: Engine Specifications Continued Val
Page 23: Engine Specifications Continued 889
Page 27 and 28: Torque Specifications & Sealers Con
Page 29 and 30: Flywheel & Transmission Components
Page 31 and 32: Additional Sealing & Tracking Metho
Page 33 and 34: P&G Test Procedure The P/G tester i
Page 35 and 36: Valve Spring Inspection Procedure T
Page 37 and 38: Engine Parts List Engine Block Comp
Page 39 and 40: Engine Parts Lists Continued Factor
Page 41 and 42: Notes Catalog Changes. 10-19-09 cha

Circle Track Crate Engine Technical Manual - Chevrolet Performance

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